WO2017008211A9

WO2017008211A9 - Retransmission-based multi-user superposition transmission method, device and system

Info

Publication number: WO2017008211A9
Application number: PCT/CN2015/083796
Authority: WO
Inventors: 郤伟; 周华; 莫斯利·缇姆斯·J
Original assignee: 富士通株式会社; 郤伟; 周华
Priority date: 2015-07-10
Filing date: 2015-07-10
Publication date: 2017-03-02
Also published as: JP2018526870A; WO2017008211A1; CN107710857A; EP3322245A1; US20180131472A1

Abstract

Provided are a retransmission-based multi-user superposition transmission method, device and system. The method comprises: a base station sends retransmission configuration information or retransmission configuration information and modulation mode information about a second UE using the retransmission technique to a first UE that is paired with the second UE to perform MUST transmission, so that the first UE detects data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information about the second UE and performs interference cancellation so as to obtain data of the first UE itself. By means of the embodiments of the present invention, unnecessary signalling overheads and repetitive detection operations are avoided, so that the performance and efficiency of MUST transmission are improved.

Description

Multi-user overlapping transmission method, device and system based on retransmission

Technical field

The present invention relates to the field of communications, and in particular, to a multi-user overlapping transmission method, apparatus and system based on retransmission.

Background technique

In recent years, with the development of society and the advancement of technology, wireless communication technology has greatly changed our lives. In order to support its exponential growth in traffic and emerging new services, future wireless communication systems should have lower latency and greater network capacity. This poses a new challenge to the existing fourth-generation wireless communication system represented by LTE (Long Term Evolution)/LTE-Advanced (Enhanced LTE). To this end, the world's major research institutions and standardization organizations have launched research on the fifth generation of wireless communication technology.

To date, all wireless communication systems employ multiple access technologies that are orthogonal multiple access. From the information theory, non-orthogonal multiple access has a larger channel capacity than orthogonal multiple access. Therefore, non-orthogonal multiple access technology has become a research hotspot of the fifth generation of wireless communication technology. Among the many non-orthogonal multiple access technologies, the most representative one is the power dimension multi-user multiplexing, such as the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) in the LTE-Advanced version 13 MUST (multiuser superposition transmission) technology.

Without loss of generality, the basic principle of MUST technology is now explained by taking two user equipments (UE, User Equipment) as an example.

When transmitting data, the eNB fully utilizes the path loss difference of the two paired UEs, and performs overlapping coding on the data of the two paired UEs, that is, allocates a larger power to the farther UEs of the two paired UEs. The closer UEs of the two paired UEs allocate less power. When receiving data, for the farther UE, the received interference (that is, the data signal of the nearer UE) is smaller due to its own transmission power, and becomes weaker after a large path loss, so that it can directly detect its own. Data signal. For the nearer UE, the data signal of the farther UE with higher signal to noise ratio needs to be detected first, and then the interference cancellation is performed (after subtracting the data signal of the farther UE that has been detected from the received signal), In order to detect your own data signal.

It should be noted that the above description of the technical background is only for the purpose of facilitating the clarity of the technical solution of the present invention. A complete description is provided to facilitate the understanding of those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

At present, the operator needs the LTE/LTE-Advanced network to support the Machine Type Communication User Equipment (MTC UE), and there will be a large number of MTC UEs in the future. Therefore, pairing with MTC UEs for MUST transmission will be very common in the future. In order to enhance coverage, MTC UEs typically use retransmission techniques, that is, transmit identical data in multiple consecutive subframes. In the FDD (Frequency Division Duplexing) and TDD (Time Division Duplexing) systems, the average number of retransmissions is 100 to 200, 200 to 300, respectively.

However, the existing MUST transmission mechanism does not utilize this feature. On the one hand, the eNB needs to notify the UE of the farther UE of the transmission configuration information of the farther UE, such as the modulation mode, in each subframe. On the other hand, although the far-end UE data to be detected is completely the same in one retransmission period, the closer UE needs to detect the completely identical data, that is, the data of the far-end UE, in each subframe. Moreover, the detection process between different subframes is completely independent. Obviously, the eNB's repeated signaling notifications for the closer UEs and the more recent UEs' repeated detection operations for the farther UE data are inefficient and completely unnecessary.

In order to solve the above problem, an embodiment of the present invention provides a multi-user overlapping transmission method, apparatus, and system based on retransmission, to avoid unnecessary signaling overhead and repetitive detection operations, thereby improving performance and efficiency of MUST transmission.

According to a first aspect of the embodiments of the present invention, a retransmission-based multi-user overlapping transmission apparatus is provided, which is applied to a base station, where the apparatus includes:

a sending unit, configured to send retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that uses the retransmission technology to the first UE that is paired with the second UE for MUST transmission, so that the first The UE detects the data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, and performs interference cancellation to obtain its own data.

According to a second aspect of the embodiments of the present invention, a retransmission-based multi-user overlapping transmission apparatus is provided, which is applied to a first UE, where the first UE is paired with a second UE for MUST transmission, and the second UE A retransmission technique is employed, wherein the device comprises:

An acquiring unit, which acquires retransmission configuration information or retransmission configuration information and a modulation mode letter of the second UE interest;

And a detecting unit, configured to detect data of the second UE according to retransmission configuration information or retransmission configuration information and modulation mode information of the second UE, and perform interference cancellation, to obtain data of the first UE.

According to a third aspect of the present invention, a retransmission-based multi-user overlapping transmission method is provided, which is applied to a base station, where the method includes:

Transmitting, by the base station, retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that uses the retransmission technology to the first UE that is paired with the second UE for MUST transmission, so that the first UE And detecting data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, and performing interference cancellation, thereby obtaining own data.

According to a fourth aspect of the embodiments of the present invention, a retransmission-based multi-user overlapping transmission method is provided, which is applied to a first UE, where the first UE is paired with a second UE for MUST transmission, and the second UE A retransmission technique is employed, wherein the method includes:

Obtaining, by the first UE, retransmission configuration information or retransmission configuration information and modulation mode information of the second UE;

The first UE detects data of the second UE according to retransmission configuration information or retransmission configuration information and modulation mode information of the second UE, and performs interference cancellation, thereby obtaining data of the first UE.

According to a fifth aspect of the embodiments of the present invention, there is provided a base station comprising the apparatus of the foregoing first aspect.

According to a sixth aspect of the embodiments of the present invention, there is provided a user equipment, comprising the apparatus of the foregoing second aspect.

According to a seventh aspect of the embodiments of the present invention, a communication system is provided, the communication system includes: a base station, a first UE, and a second UE, where the first UE and the second UE are paired for MUST transmission, The second UE adopts a retransmission technology, where

The base station is configured to:

Transmitting the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE to the first UE;

The first UE is configured to:

The data of the second UE is detected and interfered with according to the obtained retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, thereby obtaining its own data.

The embodiment of the present invention provides a scenario in which the remote UE that performs the MUST transmission with the retransmission technology performs data transmission, and the unnecessary signaling overhead and the repetitive detection are avoided by the embodiment of the present invention. Operation, which improves the performance and efficiency of MUST transmission.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprises"

DRAWINGS

The accompanying drawings are included to provide a further understanding of the embodiments of the invention Obviously, the drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any inventive labor. In the drawing:

FIG. 1 is a schematic diagram of a scenario in which two paired UEs perform MUST transmission;

2 is a schematic diagram showing the composition of an embodiment of a retransmission-based multi-user overlapping transmission apparatus according to an embodiment of the present invention;

3 is a schematic diagram showing the composition of another embodiment of a retransmission-based multi-user overlapping transmission apparatus according to an embodiment of the present invention;

Figure 4 is a schematic diagram showing the composition of an embodiment of the detecting unit in the apparatus of Figure 3;

Figure 5 is a schematic diagram showing the composition of another embodiment of the detecting unit in the apparatus of Figure 3;

6 is a flowchart of an embodiment of a retransmission-based multi-user overlapping transmission method according to an embodiment of the present invention;

7 is a flowchart of another embodiment of a retransmission-based multi-user overlapping transmission method according to an embodiment of the present invention;

8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 10 is a schematic diagram showing the topology of a communication system according to an embodiment of the present invention.

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.

FIG. 1 is a schematic diagram of a scenario in which two UEs are paired for MUST transmission according to an embodiment of the present invention. As shown in FIG. 1 , UE1 and UE2 are paired for MUST transmission, where UE1 is closer to the eNB, UE2 is farther from the eNB, and UE2 is A retransmission technique is adopted, for example, UE2 is an MTC UE. In this embodiment, for convenience of description, a UE that is closer to the eNB is referred to as a first UE, and a UE that is farther from the eNB is referred to as a second UE.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments. However, embodiments of the invention are not limited to the scenario of FIG.

Example 1

The embodiment of the present invention provides a multi-user overlapping transmission apparatus based on retransmission, which is applied to a base station (eNB), and FIG. 2 is a schematic diagram of the composition of the apparatus. Referring to FIG. 2, the apparatus 200 includes:

a sending unit 201, configured to send retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that uses the retransmission technology to the first UE that is paired with the second UE for MUST transmission, so that the The UE detects the data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, and performs interference cancellation, thereby obtaining its own data.

In this embodiment, the retransmission configuration information may include information about a frequency resource location occupied by the second UE and a current retransmission period of the second UE, for example, ending with a current retransmission period of the second UE. The remaining number of subframes; or the end position of the current retransmission period of the second UE; or the starting position of the current retransmission period of the second UE, the retransmission period size, and the like. The remaining number of subframes may also be represented as the number of remaining frames and the remainder of the subframe, wherein the remainder of the subframe is an integer ranging from 0 to 9, and the end position of the current retransmission period may be represented as a system frame number (SFN, System Frame Number) and a sub-frame remainder, current retransmission week The starting position of the period can be expressed as a system frame number and a sub-frame remainder, and the retransmission period can be expressed as the number of subframes or the number of frames and the remainder of the subframe. In this embodiment, in addition to the frequency resource location occupied by the second UE, the retransmission configuration information may further include any one or any combination of the foregoing related information.

In this embodiment, the modulation mode information is indication information of a modulation mode used by the second UE. In an embodiment, the modulation mode used by the second UE is default. For example, if the second UE is an MTC UE, the modulation mode is fixed to QPSK (Quadrature Phase Shift Keying). In this embodiment, the modulation mode information may be omitted, that is, the eNB sends only the retransmission configuration information of the second UE to the first UE, and does not send the modulation mode of the second UE to the first UE. Information, in this case, the first UE defaults to the modulation mode of the second UE as QPSK. In another embodiment, the modulation mode used by the second UE is not the default. In this case, the eNB needs to send the retransmission configuration information of the second UE and the modulation mode information of the second UE to the first UE. .

In this embodiment, the sending unit 201 may send the retransmission configuration information or the retransmission configuration information and the modulation mode information by using broadcast signaling, or may send the retransmission configuration information or the retransmission configuration by using user-specific signaling. Information and modulation method information.

In an embodiment of the present embodiment, the broadcast signaling may be SIB1 (System Information Broadcast 1), and the sending unit 201 may retransmit the retransmission configuration information or the retransmission configuration information of the second UE by using the broadcast signaling. And the modulation mode information is sent in the form of a broadcast, whereby the first UE can obtain retransmission configuration information or retransmission configuration information and modulation mode information of the second UE paired with the MUST transmission from the broadcast signaling. The triggering condition of the broadcast signaling may be a periodic trigger or a non-periodic trigger. For aperiodic triggering, it may be triggered at the beginning of the retransmission period of the second UE described above. That is, the transmitting unit 201 may periodically transmit the broadcast signaling including the above information, or may transmit the broadcast signaling including the information when the retransmission period of the second UE starts.

In another embodiment of the present embodiment, the user-specific signaling is for a specific UE, and may be RRC (Radio Resource Control) signaling, Media Access Control (MAC) signaling, Physical layer signaling, etc. The physical layer signaling here is, for example, downlink control information (DCI, Downlink Control Information) in the PDCCH or the EPDCCH. For example, the sending unit 201 may introduce a new domain in the DCI of the first UE to send the retransmission configuration information or the retransmission configuration information and the modulation mode information. The triggering condition of the user-specific signaling may be triggered when the retransmission period of the second UE starts, or may be triggered when the first UE occurs, that is, when the first UE and the second UE are configured. Triggered on success.

In this embodiment, optionally, the first UE may locally record and maintain a table, which is referred to as a retransmission information table in this embodiment, and each entry in the table represents a second using retransmission technology. Retransmission configuration information and modulation mode information of the UE (optional). In a subsequent MUST transmission, the first UE may try to find its local retransmission information table to obtain retransmission configuration information and modulation mode information of the second UE paired with the MUST transmission (optional).

With the retransmission-based multi-user overlapping transmission apparatus of the present embodiment, the eNB does not need to signal the first UE that performs the MUST transmission in each subframe, thereby greatly reducing the signaling overhead.

Example 2

The embodiment of the invention provides a multi-user overlapping transmission device based on retransmission, which is applied to a user equipment, such as the aforementioned first UE. 3 is a schematic diagram of the composition of the device. Referring to FIG. 3, the device 300 includes an acquisition unit 301 and a detection unit 302.

In this embodiment, the acquiring unit 301 is configured to acquire retransmission configuration information or retransmission configuration information and modulation mode information of the second UE.

In an embodiment of the present embodiment, the acquiring unit 301 includes: a receiving module 3011, configured to receive retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that is sent by the eNB, where The manner in which the eNB sends the above information has been described in detail in Embodiment 1, and the content thereof is incorporated herein, and details are not described herein again.

In this embodiment, the receiving module 3011 may further store the received retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE in a retransmission information table pre-stored by the first UE. The retransmission information table has been described in detail in Embodiment 1, and the contents thereof are incorporated herein, and are not described herein again. The receiving module 3011 may use the received retransmission configuration of the second UE, if the retransmission information table already includes retransmission configuration information or retransmission configuration information and modulation mode information corresponding to the second UE. The information or the retransmission configuration information and the modulation mode information replace the record corresponding to the second UE in the retransmission information table.

In another embodiment of the present embodiment, the obtaining unit 301 includes: an obtaining module 3012, configured to acquire retransmission configuration information of the second UE from a retransmission information table pre-stored by the first UE. Or retransmit the configuration information and modulation mode information. Regarding the retransmission information table, it has been done in Embodiment 1. The detailed description is incorporated herein by reference.

In this embodiment, the detecting unit 302 is configured to perform interference cancellation on the data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, to obtain data of the first UE.

4 is a schematic diagram of a configuration of an embodiment of the detecting unit 302. As shown in FIG. 4, in the embodiment, the detecting unit 302 includes: a first determining module 401, a first processing module 402, and a second processing module 403. .

In this embodiment, the first determining module 401 is configured to determine, according to the retransmission configuration information of the second UE or the retransmission configuration information and the modulation mode information of the second UE, a current retransmission period of the second UE, and the first The modulation mode of the two UEs.

The first determining module 401 may determine, according to the retransmission configuration information of the second UE, a current retransmission period of the second UE. In addition, if the acquiring unit 301 acquires the modulation mode information of the second UE, the first determining module 401 may determine, according to the modulation mode information, a modulation mode used by the second UE; if the acquiring unit 301 does not obtain the For the modulation mode information of the UE, the first determining module 401 determines that the modulation mode used by the second UE is a default modulation mode, such as a QPSK modulation mode.

The first processing module 402 and the second processing module 403 may perform corresponding processing on the data in the subframe received in the current retransmission period, where the data is processed in the current retransmission period of the second UE. The following is explained. In the present embodiment, the modulation method of the second UE is obtained, and the first processing module 402 can detect the data of the second UE in the subframe according to the specific processing, which will be specifically described below.

In this embodiment, the first processing module 402 is configured to perform soft combining on the data of the first predetermined number of subframes received in the current retransmission period of the second UE, and using the soft combined information, according to the Performing joint detection on the data of the second UE by using the modulation mode of the second UE, and performing interference cancellation on the data in the first predetermined number of subframes based on the detection result of the second UE data, to obtain a solution Decoding data of the first UE in a first predetermined number of subframes.

The first processing module 402 receives a certain number of subframes from the subframe in which the retransmission configuration information and the modulation mode information (optional) of the second UE are obtained in the current retransmission period of the second UE. The data of the subframe (referred to as the first predetermined number in the present embodiment) is soft merged.

In an embodiment, the first processing module 402 may use the soft information obtained by detecting each subframe as the a priori information of the data of the current subframe, and detect the second UE received in the current subframe in real time. data. The first processing module 402 can use the soft information of a certain number of subframes previously detected as the upper For the a priori information, the soft information of all the previously detected subframes may be used as the a priori information.

In another embodiment, the first processing module 402 may also buffer the data received in the first predetermined number of subframes, and the data of the first predetermined number of subframes are all received and softened. After the combination, the a priori information obtained by the soft combining is used to uniformly detect the data of the second UE.

Wherein, for bit-level interference cancellation, the soft information may be a log-likelihood ratio (LLR); for symbol-level interference cancellation, the soft information may be a posterior probability.

The first processing module 402, according to the modulation, in the process of detecting the data of the second UE, if the first UE receives the modulation mode information of the second UE sent by the base station, the first processing module 402 is configured according to the modulation. The mode information determines a modulation mode of the second UE. If the first UE does not receive the modulation mode information of the second UE that is sent by the base station, the first processing module 402 determines that the modulation mode of the second UE is default. Modulation method, such as QPSK modulation method. Due to the soft combining method, the reliability of detection and the accuracy of interference cancellation can be greatly improved.

In this embodiment, the second processing module 403 is configured to perform interference cancellation on data of a subsequent subframe received in a current retransmission period of the second UE by using a detection result of the data of the second UE. Data of the first UE in the subsequent subframe.

The second processing module 403 does not detect the data of the second UE in the subframes, but directly uses the foregoing pair of second data, for the data of the subsequent subframes received in the current retransmission period of the second UE. The detection result of the data of the UE is used as interference to perform interference cancellation on the received data in the subsequent subframe, and then the data of the first (first UE) is detected according to the data after the interference cancellation.

The second processing module 403 does not need to detect the data of the second UE, thereby greatly simplifying the operation and complexity of the first UE.

FIG. 5 is a schematic diagram of a composition of another embodiment of the detecting unit 302. As shown in FIG. 5, in the embodiment, the detecting unit 302 includes: a second determining module 501, a third processing module 502, a determining module 503, and The fourth processing module 504, wherein the determining module 501, the first processing module 502, and the second processing module 504 are different from the determining module 401, the first processing module 402, and the second processing module 403 of the embodiment shown in FIG. The principle is the same, and the content thereof is incorporated herein, and details are not described herein again.

In the present embodiment, the second determining module 501 is the same as the processing of the first determining module 401 in the embodiment of FIG. 4, and the content thereof is incorporated herein, and details are not described herein again.

In this embodiment, unlike the embodiment of FIG. 4, the third processing module 502 will use the previous subframes. The detected soft information is used as the a priori information of the current subframe detection, and the data of the second UE is detected according to the data received in the current subframe in real time. Specifically, the third processing module 502 utilizes the soft information accumulated by the soft combining in the process of detecting the data of the previous subframe, and the received data of the current subframe in the current retransmission period of the second UE. And detecting, according to the modulation mode of the second UE, the data of the second UE, and performing interference cancellation on the data in the current subframe based on the detection result of the second UE data, to obtain the current subframe. The data of the first UE is added, and the soft information obtained by detecting the data of the current subframe to the second UE data is added to the accumulated soft information.

In this embodiment, the determining module 503 is configured to determine whether the reliability of detecting the data of the second UE is greater than a first threshold, or whether the data of the first UE passes the cyclic redundancy check, and if the determination is yes, Returning to the fourth processing module 504, the fourth processing module 504 performs interference cancellation on the data of the subsequent subframe received in the current retransmission period of the second UE, to obtain the first in the subsequent subframe. UE data. If the determination is no, the process returns to the third processing module 501, and the third processing module 501 performs the foregoing processing on the received subframe.

In an implementation manner of FIG. 5, the reliability of detecting data of the second UE is used as a basis for detecting data of the second UE, and if the reliability of detecting data of the second UE has exceeded the first threshold, the current weight is The subsequent subframes in the transmission period no longer detect the data of the second UE, but perform interference cancellation on the received data directly by the fourth processing module 504 to obtain the data of the first UE, otherwise continue through the third processing module 502. The data of the second UE received in the subframe is detected by the soft information accumulated by the soft combining in the current retransmission period of the second UE until the reliability of the data of the second UE is detected to exceed the first threshold.

In the present embodiment, for bit-level interference cancellation, the above-mentioned reliability index is LLR, and for symbol-level interference cancellation, the above-mentioned reliability index is a posterior probability. That is, the reliability of detecting the data of the second UE may be a posterior probability (symbol-level interference cancellation) of detecting data of the second UE, or may be an amplitude (absolute value) of soft information such as LLR, and the present embodiment Do not use this as a limit.

In another embodiment of FIG. 5, whether the detected data of the first UE passes the CRC as a basis for detecting data of the second UE, if the detected data of the first UE has passed the CRC, the current weight is The subsequent subframes in the transmission period no longer detect the data of the second UE, but perform interference cancellation on the received data directly by the fourth processing module 504 to obtain the data of the first UE, otherwise continue through the third processing module 502. The data of the second UE in the received subframe is detected by the soft information accumulated by the soft combining in the current retransmission period of the second UE, until the detected data of the first UE passes the CRC.

With the retransmission-based multi-user overlapping transmission apparatus of this embodiment, the first UE does not need to always detect the data of the second UE, thereby greatly simplifying the operation and complexity of the first UE.

Example 3

The embodiment of the present invention provides a multi-user overlapping transmission method based on retransmission, and the method is applied to a base station (eNB). The principle of solving the problem is similar to that of the apparatus in Embodiment 1. Therefore, the specific implementation may refer to the implementation. The implementation of the device of Example 1 has the same contents and will not be repeatedly described.

Figure 6 is a flow chart of the method. Referring to Figure 6, the method includes:

Step 601: The base station sends retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that uses the retransmission technology to the first UE that is paired with the second UE for MUST transmission, so that the first The UE detects the data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, and performs interference cancellation to obtain its own data.

In this embodiment, the retransmission configuration information includes any one or any combination of the frequency resource location occupied by the second UE and the following information:

The number of subframes remaining at the end of the current retransmission period of the second UE, where the remaining number of subframes may be represented as the number of remaining frames and the remainder of the subframe, where the remainder of the subframe is an integer of 0-9. ;

End position of the current retransmission period of the second UE, where the end position of the current retransmission period may be represented as a system frame number and a subframe remainder;

a starting position of the current retransmission period of the second UE and a retransmission period, where the starting position of the current retransmission period may be represented as a system frame number and a subframe remainder, and the retransmission period may be represented as a sub The number of frames or frames and the remainder of the subframe.

In this embodiment, the modulation mode information is indication information of a modulation mode used by the second UE.

In this embodiment, the eNB sends the retransmission configuration information or the retransmission configuration information and the modulation mode information through broadcast signaling or through user-specific signaling.

The triggering condition of the foregoing broadcast signaling is a periodic trigger or an aperiodic trigger. For the aperiodic triggering, it may be triggered when the retransmission period of the second UE starts.

The triggering condition of the user-specific signaling may be triggered when the retransmission period of the second UE starts, or may be triggered when the first UE occurs.

The foregoing user-specific signaling may be RRC signaling, MAC signaling, or physical layer signaling, for example, DCI signaling in PDCCH or EPDCCH.

With the retransmission-based multi-user overlapping transmission method of the present embodiment, the eNB does not need to signal the first UE that performs the MUST transmission in each subframe, thereby greatly reducing the signaling overhead.

Example 4

The embodiment of the present invention further provides a retransmission-based multi-user overlapping transmission method, where the method is applied to a user equipment (UE), such as the foregoing first UE, where the first UE is paired with the second UE for MUST transmission, and The second UE employs a retransmission technique. Since the principle of solving the problem is similar to that of the device of Embodiment 2, the specific implementation can refer to the implementation of the device of Embodiment 2, and the description of the same portions is not repeated.

Figure 7 is a flow chart of the method, as shown in Figure 7, the method includes:

Step 701: The first UE acquires retransmission configuration information or retransmission configuration information and modulation mode information of the second UE.

Step 702: The first UE detects data of the second UE according to retransmission configuration information or retransmission configuration information and modulation mode information of the second UE, and performs interference cancellation, thereby obtaining the first UE's own data.

In an implementation of the step 701, the first UE may obtain the retransmission configuration of the second UE by receiving retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that is sent by the eNB. Information or retransmission of configuration information and modulation mode information. Optionally, the first UE may further save the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE into a pre-stored retransmission information table. And optionally, if the retransmission configuration information or the retransmission configuration information and the modulation mode information corresponding to the second UE are already in the retransmission information table, the first UE may use the received weight of the second UE. The transmission configuration information or the retransmission configuration information and the modulation mode information replace the record corresponding to the second UE already in the retransmission information table.

In another implementation of step 701, the first UE may obtain retransmission configuration information or retransmission configuration information and modulation mode information of the second UE from a pre-stored retransmission information table.

In an implementation of step 702, the first UE determines a current retransmission period of the second UE and the second UE according to retransmission configuration information or retransmission configuration information and modulation mode information of the second UE. a method of modulating a data of a first predetermined number of subframes received in a current retransmission period of the second UE, using soft combining information, according to a modulation manner of the second UE The second UE Performing joint detection on the data, and performing interference cancellation on the data in the first predetermined number of subframes based on the detection result of the second UE data, to obtain the first predetermined number of subframes. The data of the first UE is used to perform interference cancellation on the data of the subsequent subframe received in the current retransmission period of the second UE by using the detection result of the second UE data, to obtain the subsequent subframe. The data of the first UE in the data.

In another implementation of step 702, the first UE may further determine a current retransmission period of the second UE according to retransmission configuration information or retransmission configuration information and modulation mode information of the second UE, and a modulation mode of the second UE; in the current retransmission period of the second UE, using soft information accumulated by soft combining in the process of detecting data of the previous subframe, and receiving data of the current subframe, according to The modulation mode of the second UE detects the data of the second UE, and performs interference cancellation on the data in the current subframe based on the detection result of the second UE data, to obtain the current subframe. And the soft information obtained by detecting the second UE data in the current subframe is added to the accumulated soft information; determining whether the reliability of detecting the data of the second UE is greater than the first Threshold, or determining whether the data of the first UE passes the cyclic redundancy check; when the determination is yes, using the detection result of the second UE data, in the current retransmission period of the second UE After receiving The data of the continuation subframe is subjected to interference cancellation, and the data of the first UE in the subsequent subframe is obtained; when the determination is no, the foregoing processing of the data of the second UE in the received subsequent subframe is continued.

The current retransmission period of the second UE may be determined according to the retransmission configuration information of the second UE, and the modulation mode of the second UE may be determined according to the obtained modulation mode information, or may be default.

Wherein, for bit-level interference cancellation, the indicator of the reliability is a log likelihood ratio (LLR); and for symbol level interference cancellation, the indicator of the reliability is a posterior probability.

With the retransmission-based multi-user overlapping transmission method of the embodiment, the first UE does not need to always detect the data of the second UE, thereby greatly simplifying the operation and complexity of the first UE.

Example 5

An embodiment of the present invention provides a base station, which includes the retransmission-based multi-user overlapping transmission apparatus as described in Embodiment 1.

FIG. 8 is a schematic diagram of a structure of a base station according to an embodiment of the present invention. As shown in FIG. 8, base station 800 can include a central processing unit (CPU) 801 and memory 802; and memory 802 is coupled to central processing unit 801. Wherein the memory 802 can store various data; in addition, a program for information processing is stored, and at the central processing unit 801 The program is executed under the control of the device to receive various information transmitted by the user equipment and to transmit various information to the user equipment.

In one embodiment, the functionality of the retransmission based multi-user overlay transmission device described in embodiment 1 may be integrated into central processor 801.

In another embodiment, the retransmission-based multi-user overlapping transmission apparatus described in Embodiment 1 may be configured separately from the central processing unit 801. For example, the retransmission-based multi-user overlapping transmission apparatus described in Embodiment 1 may be configured. For the chip connected to the central processing unit 801, the function of the retransmission-based multi-user overlapping transmission device described in Embodiment 1 is implemented by the control of the central processing unit 801.

In addition, as shown in FIG. 8, the base station 800 may further include: a transceiver 803, an antenna 804, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and details are not described herein again. It is to be noted that the base station 800 does not have to include all of the components shown in FIG. 8; in addition, the base station 800 may also include components not shown in FIG. 8, and reference may be made to the prior art.

With the base station of this embodiment, the eNB does not need to signal the first UE that performs the MUST transmission in each subframe, thereby greatly reducing the signaling overhead.

Example 6

An embodiment of the present invention provides a user equipment, where the user equipment includes a retransmission-based multi-user overlapping transmission apparatus as described in Embodiment 2.

FIG. 9 is a schematic block diagram showing the system configuration of the user equipment 900 according to an embodiment of the present invention. As shown in FIG. 9, the user device 900 can include a central processor 901 and a memory 902; the memory 902 is coupled to the central processor 901. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the functionality of the retransmission based multi-user overlay transmission device may be integrated into the central processor 901.

In another embodiment, the retransmission-based multi-user overlapping transmission device may be configured separately from the central processing unit 901. For example, the retransmission-based multi-user overlapping transmission device may be configured as a chip connected to the central processing unit 901 through the center. The control of the processor 901 implements the functionality of the retransmission based multi-user overlay transmission device.

As shown in FIG. 9, the user equipment 900 may further include: a communication module 903, an input unit 904, an audio processing unit 905, a display 906, and a power supply 907. It is worth noting that the user equipment 900 is not necessary. All of the components shown in FIG. 9 are to be included; in addition, the user equipment 900 may also include components not shown in FIG. 9, and reference may be made to the prior art.

As shown in FIG. 9, central processor 901, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls various aspects of user device 900. The operation of the part.

The memory 902 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. The above information can be stored, and a program for executing the related information can be stored. And the central processing unit 901 can execute the program stored in the memory 902 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. The various components of user device 900 may be implemented by special purpose hardware, firmware, software, or a combination thereof without departing from the scope of the invention.

With the user equipment of this embodiment, the first UE does not need to always detect the data of the second UE, thereby greatly simplifying the operation and complexity of the first UE.

Example 7

The embodiment of the present invention further provides a communication system, where the communication system includes: a base station, a first UE, and a second UE, where the first UE and the second UE are paired for MUST transmission, and the second UE adopts Retransmission technology. The user equipment as described in embodiment 6 and the base station as described in embodiment 5 are included.

FIG. 10 is a schematic diagram showing the configuration of an embodiment of the communication system. As shown in FIG. 10, the communication system 1000 includes a base station 1001, a first user equipment 1002, and a second user equipment 1003. The base station 1001 may be the base station 800 described in Embodiment 5; the first user equipment 1002 may be the user equipment 900 described in Embodiment 6. Since the base station 800 and the user equipment 900 have been described in detail in the foregoing embodiments, the contents thereof are incorporated herein, and are not described herein again.

In this embodiment, the base station 1001 is configured to: send retransmission configuration information or retransmission configuration information and modulation mode information of the second UE 1003 to the first UE 1002.

In this embodiment, the first UE 1002 is configured to: detect, according to the obtained retransmission configuration information of the second UE, or retransmission configuration information and modulation mode information, and perform interference cancellation, Thereby getting your own data.

With the communication system of the embodiment, the eNB does not need to signal the pairing for MUST in each subframe. The first UE is transmitted, thereby greatly reducing the signaling overhead. The first UE does not need to always detect the data of the second UE, thereby greatly simplifying the operation and complexity of the first UE.

An embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an information processing device or a base station, the program causes a computer to perform the method described in Embodiment 3 in the information processing device or a base station Retransmitted multi-user overlapping transmission method.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the retransmission-based multi-user overlapping transmission method described in Embodiment 3 in an information processing device or a base station .

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an information processing apparatus or a user equipment, the program causes the computer to execute the embodiment 4 in the information processing apparatus or the user equipment A multi-user overlapping transmission method based on retransmission.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to perform the retransmission-based multi-user overlapping transmission described in Embodiment 4 in the information processing device or the user equipment. method.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the present invention within the scope of the present invention.

Claims

A retransmission-based multi-user overlapping transmission apparatus is applied to a base station, wherein the apparatus includes:

a sending unit, configured to send retransmission configuration information or retransmission configuration information and modulation mode information of the second UE that uses the retransmission technology to the first UE that is paired with the second UE for MUST transmission, so that the first The UE detects the data of the second UE according to the retransmission configuration information or the retransmission configuration information and the modulation mode information of the second UE, and performs interference cancellation to obtain its own data.
The apparatus according to claim 1, wherein the retransmission configuration information comprises any one or any combination of frequency resource locations occupied by the second UE and the following information:

The number of subframes remaining at the end of the current retransmission period of the second UE;

End position of the current retransmission period of the second UE;

The starting position of the current retransmission period of the second UE and the retransmission period size.
The device according to claim 2, wherein

The remaining number of subframes is represented by the number of remaining frames and the remainder of the subframe, wherein the remainder of the subframe is an integer of 0-9;

The end position of the current retransmission period is represented as a system frame number and a sub-frame remainder;

The starting position of the current retransmission period is represented as a system frame number and a sub-frame remainder, and the retransmission period is expressed as the number of subframes or the number of frames and the remainder of the subframe.
The apparatus according to claim 1, wherein said modulation scheme information is indication information of a modulation scheme used by said second UE.
The apparatus according to claim 1, wherein the transmitting unit transmits the retransmission configuration information or the retransmission configuration information and modulation mode information by using broadcast signaling or by user-specific signaling.
The apparatus according to claim 5, wherein the triggering condition of the broadcast signaling comprises:

Periodically triggered or acyclically triggered;

The aperiodic triggering includes: triggering when a retransmission period of the second UE starts.
The apparatus according to claim 5, wherein the triggering condition of the user-specific signaling comprises:

Triggering at the beginning of the retransmission period of the second UE; or

Triggered when the first UE appears.
The apparatus of claim 5 wherein said user-specific signaling comprises:

Radio Resource Control (RRC) signaling; or